Convert millimetre to centimetre

1 millimetre = 0.1 centimetres. Enter any value below for an exact conversion.

Value in millimetres

1 mm =

0.1 cm

centimetres

Need the reverse? Convert centimetre to millimetre →

Formula

1 millimetre = 0.1 centimetres
centimetre = millimetres × 0.1
millimetre = centimetres × 10

millimetre to centimetre conversion table

1 mm0.1 cm

2 mm0.2 cm

3 mm0.3 cm

5 mm0.5 cm

10 mm1 cm

20 mm2 cm

25 mm2.5 cm

50 mm5 cm

100 mm10 cm

1000 mm100 cm

About converting millimetres to centimetres

Millimetres to centimetres converts fine measurements — screw lengths, paper thickness, rainfall, tyre tread — into the slightly larger unit used for rulers and body measurements. Divide by 10.

Method & sources

Conversions use exact legal definitions rather than rounded approximations: 1 inch = 2.54 cm and 1 pound = 0.45359237 kg (fixed by the 1959 international yard and pound agreement), 1 mile = 1.609344 km, and 1 US liquid gallon = 3.785411784 litres. Temperatures convert with °F = °C × 9⁄5 + 32 and K = °C + 273.15. Results are rounded only for display.

Page last updated: October 1, 2026

Frequently asked questions

How many centimetres are in a millimetre?

One millimetre equals 0.1 centimetres. So 10 millimetres is 1 centimetres. Use the converter above for any value.

What is the formula to convert millimetres to centimetres?

1 millimetre = 0.1 centimetres centimetre = millimetres × 0.1 millimetre = centimetres × 10

Is the millimetre-to-centimetre conversion exact?

Yes. The conversion factor between millimetres and centimetres is defined exactly, so results are precise — only rounded for display.

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